Instagram Post Size Guide: Dimensions for 2026

The Ultimate Guide to Instagram Post Sizes: Dimensions, Ratios, and Best Practices

Whether you are building a brand, sharing photography, or curating a personal feed, understanding the mechanics of Instagram post sizes is essential. Uploading an image with the wrong dimensions can result in awkward cropping, blurry compression, or cut-off text that ruins your layout.

To keep your content crisp and professional, here is the complete breakdown of the best dimensions and aspect ratios for every type of Instagram post.

1. Instagram Feed Posts

The feed is the heart of Instagram. While the platform once required a strict square format, it now supports multiple aspect ratios, giving you more creative freedom.

• Portrait (Recommended): 1080 × 1350 pixels (4:5 aspect ratio) or 1080 × 1440 pixels (3:4 aspect ratio).
  • Why use it: Vertical posts take up the most physical real estate on a mobile phone screen, making them the gold standard for engagement, photography, and educational carousels.
• Square: 1080 × 1080 pixels (1:1 aspect ratio)
  • Why use it: The classic uniform look. While they don’t dominate the screen like portrait shots do, square posts are great for minimalist grids and multi-platform cross-posting.
• Landscape (Horizontal): 1080 × 566 pixels (1.91:1 aspect ratio)
  • Why use it: Best for wide-angle landscape photography. Keep in mind that landscape images have a smaller footprint in the feed and will display with letterboxing (side borders).

Pro Tip for Profile Grids: Remember that your main profile grid displays thumbnail previews in a vertical shape. If you use square or wide images, the sides will be trimmed on your profile grid, so always keep your core subjects and text centered.

2. Instagram Stories (9:16)

Instagram Stories are designed for full-screen, vertical viewing.

• Recommended Size: 1080 × 1920 pixels (9:16 aspect ratio)
• The Safe Zone Rule: Do not clutter the very top and bottom edges of your Story. Instagram overlays user handles, reply boxes, and navigation bars in these areas. Aim to keep critical text, stickers, and logos within the central framework to prevent them from being blocked by interface elements.

3. Instagram Reels & Cover Photos

Reels are one of the most powerful discovery tools on the platform, and they rely on the same vertical layout as Stories.

• Video Dimensions: 1080 × 1920 pixels (9:16 aspect ratio)
• Reel Covers/Thumbnails: Design your cover images at 1080 × 1920 pixels, but remember that they shrink down when displayed on your main profile grid. Keep titles, text, and faces packed tightly into the center so they remain readable at a smaller scale.

Quick Checklist for Success

1. Design at 1080px Width: As a general rule, sticking to a minimum width of 1080 pixels ensures your images look sharp on high-resolution smartphone screens.
2. Watch the Margins: Always leave breathing room around the edges of your graphics and text.
3. Check the Preview: Before hitting publish, look at how your post translates to both the main feed and your profile grid to ensure nothing vital gets cropped out.